Which best matches the description with the genetic material?
nucleotides form a helical structure that is called a gene.
chromosomes are located in the cytoplasm.
chromosomes create genes.
dna is located in the nucleus.

If a strand of dna has 35% thymine. what is the percentage of cytosine, adenine, guanine?

Need with these questions . need the answers in a rush for these questions are the answers i put down are correct or not? ?

Crinoids, also known as sea lilies, appear to be sea plants but are not plants at all. crinoids are an echinoderm species which uses anchoring structures called holdfasts to attach themselves to the sea floor. crinoids were most abundant in pennsylvania during the mississippian period, which ranged from 375 to 320 million years ago. fossils of the crinoids shows that during most of this time pennsylvania was that provided favorable conditions for crinoid growth. a) glacial terrain b) a dry and sandy plain c) mostly mountain ranges d) covered by warm, shallow seas